Measles Outbreak and Herd Immunity: This New England Journal of Medicine Quick Take Video Summary highlights a research study on a 2014 measles outbreak in an
Ohio Amish community. Two unvaccinated Amish men infected when traveling in the Philippines led to 383 people (about 90% of them unvaccinated) contracting measles.
The study demonstrates how measles can spread in an unvaccinated population.

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